Fixed bugs that were preventing NVR and Flash files from behind saved;

A lot of clean ups from waltje;
Start of a directory structure for the code, thanks to waltje.

src/VIDEO/vid_stg_ramdac.h

@@ -0,0 +1,14 @@
+/* Copyright holders: Sarah Walker, Tenshi
+   see COPYING for more details
+*/
+typedef struct stg_ramdac_t
+{
+        int magic_count;
+        uint8_t command;
+        int index;
+        uint8_t regs[256];
+} stg_ramdac_t;
+
+void stg_ramdac_out(uint16_t addr, uint8_t val, stg_ramdac_t *ramdac, svga_t *svga);
+uint8_t stg_ramdac_in(uint16_t addr, stg_ramdac_t *ramdac, svga_t *svga);
+float stg_getclock(int clock, void *p);